Accurate gauging and 50-μA standby current, 13S, 48-V li-ion battery pack reference design

(ACTIVE) TIDA-010030

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Key Document

Description

This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over temperature and over current situations. The SOC gauging, based on bq34z100-g1, takes advantage of an impedance tracking algorithm and achieves as high as 2% accuracy at room temperature. Through a well-designed auxiliary power supply strategy and high efficiency, low quiescent current DC-DC converter LM5164, this design achieves 50-μA stand-by and 5-μA ship mode consumption, saving more energy and allowing longer shipping time and idle time. Also, this design supports a well running firmware, which helps to decrease product research time.

Features
  • 2% battery pack SOC accuracy at room temperature
  • 50-μA current consumption when in standby mode
  • 15-μA current consumption when in shipping mode
  • Robust and programmable protection, including: cell over voltage, cell under voltage, overcurrent discharge, short circuit, overtemperature and undertemperature
  • Support 100-mA cell balancing
  • High-side charging and discharging MOSFETs and support pre-discharge function

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (12)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ34Z100-G1  Multi-chemistry impedance track standalone fuel gauge | battery gas gauge  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ76200  High-Side N-Channel FET Driver   Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ76940  9 to 15-Series Cell Li-Ion and Li-Phosphate Battery Monitor (bq76940 Family)  Battery management  Sample & Buy View Design Kits & Evaluation Modules
BQ7718  Family 2-5S Overvoltage Protector with Internal Delay Timer  Battery management  Sample & Buy View Design Kits & Evaluation Modules
CSD19536KTT  CSD19536KTT 100 V N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy Not Available
ISO1042  Isolated CAN Transceiver With 70-V Bus Fault Protection and Flexible Data Rate  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM5164  6-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ  Step-down (buck)  Not Available View Design Kits & Evaluation Modules
MSP430FR2155  24MHz 105C ULP Microcontroller With 32 KB FRAM, 4 KB SRAM, 44 IO, 12-bit ADC  MSP430 ultra-low-power MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN6501  Low-noise, 350 mA, 410-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
THVD1500  5V RS-485 Transceivers up to 500kbps With ±8kV IEC ESD Protection  Interface  Sample & Buy Not Available
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPD2E007  2-Channel ESD Protection Array for AC Signal Data Interface  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ34Z100-G1 Download Download
BQ76200 Download Download
BQ76940 Download Download
BQ7718 Download -
CSD19536KTT Download -
ISO1042 Download Download
Download Download
LM5164 Download Download
MSP430FR2155 Download
Download
SN6501 Download Download
THVD1500 Download
TLV704 Download Download
TPD2E007 Download -
Download -
Download -

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date
PDF 7322 01 Feb 2019
Design files (6)
Title Abstract Type Size (KB) Date
ZIP 1425 14 Dec 2018
ZIP 6490 14 Dec 2018
ZIP 1275 14 Dec 2018
ZIP 317 14 Dec 2018
ZIP 345 14 Dec 2018
ZIP 653 14 Dec 2018

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